CONDITION
Sarcoptic Mange
Why this matters now
Sarcoptic mange can occur at any age but is often encountered in dogs that have had contact with wildlife, particularly foxes, or with other infected dogs. Kennels, shelters, and multi-dog households may see higher transmission rates. The condition can develop at any time of year, though cases may be more frequently identified when dogs have greater outdoor exposure.
The condition typically begins with localised itching that intensifies rapidly over days to weeks. Initial areas of involvement often include the ear margins, elbows, hocks, and chest. Without intervention, the infestation tends to spread across the body, causing progressive hair loss, skin thickening, and crusting. Secondary bacterial infections may complicate the picture. The intense pruritus can significantly affect quality of life and sleep patterns.
Signals & patterns
Early signals
Intense scratching, particularly at ear margins
The ear edges are often among the first areas affected, causing frequent head shaking and ear scratching.
Red, irritated skin on elbows and hocks
These areas commonly contact the ground and often show early signs of inflammation and hair loss.
Restlessness and difficulty settling
The constant itching sensation may prevent comfortable rest, causing pacing or frequent position changes.
Small raised bumps or papules
Early skin lesions may appear as small red bumps before progressing to more extensive changes.
Later signals
Widespread hair loss and crusting
As the infestation spreads, larger areas of skin become affected with thick yellowish crusts.
Thickened, wrinkled skin
Chronic inflammation causes the skin to become thickened and develop an elephant-skin appearance.
Secondary skin infections
Damaged skin barriers allow bacterial invasion, causing pustules, discharge, and unpleasant odour.
Weight loss and exhaustion
Severe cases may affect overall condition due to constant scratching, reduced rest, and poor appetite.
Click to read about the biological mechanisms
How this is usually investigated
Diagnosis can sometimes be challenging as mites may be difficult to find on skin scrapings. Clinical presentation and response to treatment often contribute to diagnosis.
Skin scraping
Pinnal-pedal reflex test
Coat brushings
Serology (blood test for mite antibodies)
Trial treatment
Options & trade-offs
Management involves eliminating the mite infestation and addressing secondary complications. Treatment of the environment and other in-contact animals may also be necessary.
Systemic antiparasitic medications
Various oral or injectable medications target the mites directly and are often effective with appropriate treatment courses.
Trade-offs: Treatment typically requires multiple doses over several weeks. Some products may not be suitable for certain breeds or animals with specific health conditions.
Topical antiparasitic treatments
Spot-on or wash products applied directly to the skin to kill mites.
Trade-offs: May require more frequent application than systemic treatments. Effectiveness depends on thorough application and may be affected by coat density.
Medicated baths
Bathing with specific antiparasitic shampoos or dips to reduce mite numbers and soothe skin.
Trade-offs: Can help remove crusts and debris. May need to be combined with other treatments for complete resolution.
Treatment of secondary infections
Antibiotics or medicated shampoos to address bacterial complications.
Trade-offs: May be needed alongside antiparasitic treatment. The skin barrier typically improves once the primary infestation is controlled.
Environmental treatment
Washing bedding and treating shared spaces to reduce environmental mite burden.
Trade-offs: Mites survive only briefly off the host, but thorough cleaning supports treatment success and reduces reinfection risk.
Common misconceptions
"Negative skin scrapings rule out sarcoptic mange"
Mites can be difficult to find as relatively few mites may cause severe symptoms. Negative scrapings occur in a significant proportion of confirmed cases.
"Sarcoptic mange only affects poorly cared for dogs"
Any dog can contract sarcoptic mange through contact with infected animals or environments, regardless of their overall care or living conditions.
"Humans cannot be affected"
Sarcoptes mites can temporarily infest humans, causing itchy red bumps (often on arms and torso), though they cannot complete their lifecycle on human hosts and typically resolve without treatment.
Noting when the itching started and whether it has progressively worsened can help establish the timeline. Considering whether the dog has had contact with foxes, other dogs, or environments where wildlife frequents may provide relevant context. Observing whether the itching seems worse at certain times, such as at night, and which body areas are most affected can offer useful information for veterinary discussions.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS